# CJ6388B50M

**Changjing** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L

CJ6388B50M from Changjing, in a SOT-23-5L. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VOUT | output | Regulated output pin; the series supplies output voltages from 1.2 V to 12.0 V with output current up to 150 mA. |
| 2 | VSS | power_in | Ground pin, which is the network ground reference for all voltages. |
| 3 | NC | unconnected | No connection. |
| 4 | CE | input | Chip enable pin; drive above 1.5 V (up to VIN) to enable the regulator and below 0.3 V to disable it, with standby current of 0.1 to 0.5 μA when CE = VSS. |
| 5 | VIN | power_in | Power input pin; the supply voltage range is 2.5 V to 60 V, and CIN of 1.0 μF or more should be connected between VIN and VSS as close to the pins as possible. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23-5L |
| Category | Power Management (PMIC) |
| Pins | 5 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage at VIN | VIN | 2.5 |  | 60 | V |  | 3 |
| Operating junction temperature range | Tj | -40 |  | 125 | °C |  | 3 |
| Operating free air temperature range | TA | -40 |  | 85 | °C |  | 3 |
| Input Voltage | VIN | -0.3 |  | 65 | V |  | 3 |
| Output Voltage | VOUT | -0.3 |  | 15 | V |  | 3 |
| CE Pin Voltage | VCE | -0.3 |  |  | V |  | 3 |
| Output Current | IOUT |  |  | 400 | mA |  | 3 |
| Power Dissipation (SOT-23-3L/5L) | PD |  |  | 400 | mW | SOT-23-3L/5L package | 3 |
| Storage Temperature | Tstg | -40 |  | 125 | °C |  | 3 |
| Lead Temperature (Soldering) | Tsolder |  |  | 260 | °C | Soldering, 10 sec | 3 |
| ESD rating Human Body Model |  |  |  | 2 | kV | Human Body Model (HBM) | 3 |
| ESD rating Machine Model |  |  |  | 200 | V | Machine Model (MM) | 3 |
| Input Voltage | VIN | 2.5 |  | 60 | V |  | 4 |
| Output Voltage Range | VOUT | 1.2 |  | 12 | V |  | 4 |
| DC Output Accuracy (grade ±2%) |  | -2 |  | 2 | % | IOUT=1mA | 4 |
| DC Output Accuracy (grade ±1%) |  | -1 |  | 1 | % | IOUT=1mA | 4 |
| Supply Current | ISS |  | 3 | 6 | μA | IOUT=0A, VOUT≤5.0V | 4 |
| Standby Current | ISTBY |  | 0.1 | 0.5 | μA | CE = VSS | 4 |
| Line Regulation | ∆VOUT/(VOUT×∆VIN) |  | 0.01 | 0.3 | %/V | IOUT=10mA, VOUT+1V≤VIN≤18V | 4 |
| Output Current Limit | ILIM | 150 |  | 250 | mA | VOUT=0.5xVOUT(Normal), VIN=5V | 4 |
| CE High Voltage | VCE“H” | 1.5 |  |  | V |  | 4 |
| CE Low Voltage | VCE“L” |  |  | 0.3 | V |  | 4 |

## CAD (KiCad official)

- Symbol: `CJ6388B50M`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files: `cj6388b50m-etched.step` / `cj6388b50m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cj6388b50m.step` / `cj6388b50m.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602955369870614528) (13 pp, sha256 `1139e550c7ef2e3c`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/cj6388b50m-datasheet.pdf)